42154123 has 8 divisors (see below), whose sum is σ = 46541376. Its totient is φ = 37859400.

The previous prime is 42154121. The next prime is 42154153. The reversal of 42154123 is 32145124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42154123 - 2¹ = 42154121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42154094 and 42154103.

It is not an unprimeable number, because it can be changed into a prime (42154121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22173 + ... + 23998.

It is an arithmetic number, because the mean of its divisors is an integer number (5817672).

Almost surely, 2^42154123 is an apocalyptic number.

42154123 is a deficient number, since it is larger than the sum of its proper divisors (4387253).

42154123 is a wasteful number, since it uses less digits than its factorization.

42154123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46265.

The product of its digits is 960, while the sum is 22.

The square root of 42154123 is about 6492.6206573309. The cubic root of 42154123 is about 348.0273324857.

Adding to 42154123 its reverse (32145124), we get a palindrome (74299247).

It can be divided in two parts, 4215 and 4123, that added together give a palindrome (8338).

The spelling of 42154123 in words is "forty-two million, one hundred fifty-four thousand, one hundred twenty-three".